Gas burner



P. S. HARPER GAS BURNERS Filed March 4, 1940 2 Sheets-Sheet 1 III" 'INVENTOR. PMZ Q flficzrpa BY ATTORNE 5 1942- P. s. HARPER 2,297,762

GAS BURNERS 7 Filed March 4, 1940 z Sheets-Sheet 2 INVENTOR.

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ATTORNEY 5- iTEo STATE GAS BURNER Philip S. Harper, Chicago, 111.,assignor, by direct and mesne assignments, of one-fourth to Philip S.Harper and one-fourth to Carolyn L. Harper, both of Chicago, Ill., andone-fourth to Harris Trust and Savings Bank, an Illinois bankingcorporation, as trustee of the Philip S. Harper trust, and one-fourth tosaid Harris Trust and Savings Bank, as trustee of the Carolyn L. Harpertrust Application March 4, 1940, Serial No. 322,062

Claims.

The present invention relates to-novel burner constructions, and-more inparticular to multiple type burners for gas stoves and the like,embodying novel means for lighting said" burners or cross-lightingbetween the said burners.

Among'the objects of the present invention is to provide a novel burnerof the multiple burner.

type characterized by the incorporation of novel means for effectingcross-lighting between the said burners.

Among the problems involved in the manufacture of burners'of the typeherein contemplated are those relating to the burner efliciency, theease of manufacture, the arrangement of the said burner elements toprovide for supplying the necessary secondary air supporting combustion,and the design of the said burner to facilitate its manufacture at lowcost. Considerable thought and attention have been directed to themanufacture of these burners so as to secure I increased efficiency byproper design of the burner elements, and the location of the burners inrespect of one another. In the constructions herein comprehended, thenormal location of the burners in order to secure the efficiencydesired, does'not permit direct cross-lighting of the said burners, andit is accordingly necessary to provide some auxiliary means to bringabout this condition. Heretofore in the construction of these burners,one of the principal factors involved has been the disposition of theburners in respect to one another for maximum burner efliciency withvery little attention being given to the question of cross-lightingother than to provide such a means without regard to its relation to theburner construction in respect of increased manufacturing costs due tomore complicated designs, addition of parts or elements, and theincreased labor involved in assembling the same.

The present invention therefore has as one of its principal objects theprovision of a multiple type burner characterized by embodying within vits structure novel means for effecting crosslighting between the saidburners and being of simplified design requiring a minimum of parts andmanufacturing steps, thus greatly decreasing manufacturing costs, yetproviding for the eflicient cross-lighting of the burners without in anyway affecting their normal operating efficiency. l

The invention has proceeded upon the theory of providing a novelcross-lighting means for the burners which may be embodied in the burnerassembly in such a way as to greatly simplify their design, yet being soconstructed and arranged that the same will not clog and may be readilycleaned when desired.

Still a further object of the present invention is to provide a novelburner of the multiple burner type embodying in its construction novelmeans for cross-lighting, comprising flame propagation meanscommunicating with gas conducting chambers of the said burners and beingdisposed in flame igniting relation to the said burners and to eachother. More particularly, such novel structure for the cross-lightingmeans may be constituted by adjacently disposed slots or openings in thewalls of the said chambers, so disposed in relation to one another andto the said burners that flame propagation may be effected between thesaid burners.

Still a further object of the present invention is to provide a novelarrangement for the flame propagation means whereby flame may bepropagated effectively and efficiently to effect crosslighting of theburners, as desired. Such an assembly therefore contemplates anarrangement of the said flame propagation means with due regard for theburner design and the secondary air requrements for the said flamepropagation means to assure proper travel of flame along the same. Inthe illustrative embodiments selected to disclose the invention, thesaid flame propagation means may include a slot or openings incommunication with one of the gas conducting chambers for one of theburners disposed adjacent an unrestricted passage for the movement ofsecondary air.

The present invention also contemplates a novel construction andarrangement for the said flame propagation means with respect to atleast one of the said burners whereby flame propagation may be properlyeffected between the same and said burner even though obstructions inthe form of an abutment or overhanging ledge, are interposedtherebetween in accordance with burner design requirement or for burnerefiiciency and the like.

Still another object within the purview of the present invention is toprovide means in combination with the structures hereinabove describedwhereby lighting of said burners may be effected from a flame remotelypositioned with respect to the said burners.

Other objects, features, capabilities and advantages are comprehended bythe invention, as will later appear and as are inherently possessedthereby.

Referring to the drawings:

taken in the plane represented by line 3-3 of I that figure;

Figure 4 is a fragmentary view in cross section taken in the planerepresented by line 4--4 of Figure 2 of the drawings; v

Figure 5 is a top plan View of a burner device embodying a burner headof modified construction;

Figure 6 is a bottom plan view of the burner head shown in Figure 5;

ing across the annular chambers 28 and 30, the said bridging web or wallbeing of segmental formation, as disclosed in the drawings, and beingdefined laterally by the marginal upstanding walls 44 and 46, whichmerge with the walls 22, 24 and 26. I

The burner head is secured to the base 4 therefor by means of aplurality of bolts or the like 48 engaging in aligned openings providedin the annular flange 38 and the opposed flange of the said base 4, itbeing observed that when the burner head is connected in the positiondisclosed in Figure 1, as by means of said bolts or screws, that theannular walls 22, 24 and 26 and Figure 7 is a view in cross sectiontaken in the plane represented by line 7-7 of Figure 6;

Figure 3 is a view'in cross section taken in'the plane represented byline 23-43 of Figure 6; and

Figure 9 is a fragmentary view in cross section taken in the planerepresented by line 9-9 of Figure 6.

Referring now more in detail to the drawings, a burner head embracingthe present invention and selected to'illustrate the same is generailyreferred to as 2, and is disclosed in Figure 1 of the drawings'inoperative association with a'burner base 4 which is one of a group orbattery oi such burners which may be used in a burner device for gasstoves or the like. The base i of the burner device of Figure 1comprises essentially two concentrically arranged gas conductingchambers, such as i and communicating by way of suitable ducts iii andi2, respectively, with a valved gas supply and with the said burner 2which incorporates improved structure in accordance with the presentinvention. 0peratively associated with a battery of such burners is apilot light l4, supplied with gas through valved jet i5 and with whichis associated a plurality of flashtubes, such as l8, each of which maybe mounted as disclosed within a bracket such as 29, on one of the gasconduits and connected to an individual burner head, as will behereinafter more fully described.

The present invention is directed more in particular to the constructionof the burner head 2, with special provision for cross-lighting betweenthe two burners provided on the head. In the illustrative example ofFigures 1 to 4 inclusive, the said head is preferably of integralconstruction, formed by way of a casting to provide the concentricallyarranged upstanding walls 22, 24 and 26, providing therebetween. theannular gas conducting chambers 28 and 30, the said upstanding wallsbeing bridged or connected adjacent their top by a concave or dished web32. The-web or wall 32 terminates along its upper marginal edge with thewall 28 and at its lower marginal edge with the upstanding wall 22, thusproviding a flue at the center of the burner defined in part by theannular wall 22.

The outer upstanding wall 25 is slightly tapered from its lower endtoward the top and is provided with an annular shoulder 36 for a purposeto be hereinafter more fully described. This upstanding wall 2% isfurther provided at its lower end with an annular laterally extendingflange reinforced by a plurality of pillars iii suitably positionedaround the same. 7 The head further embodies in its construction abridging or connecting web or wall 42 axially ofifset as at 43 at itsjunction with wall 26 and extendthe radially disposed walls 44 and 46are disposed in abutting relation to complementary walls of the saidburner base whereby the chambers 28 and 30, together with the chambers 6and 8, form completely enclosed conduits communicating-with the conduitsl0 and I2, respectively, for the passage of gas to the burner head.

The formation of the burner head as disclosed above provides for theefiicient operation of two burners, the inner one of which is formedasby way of a plurality of burner ports 50 extending into communicationwith the chamber 28 at the junction of upstanding wall 22 and connectingwall 32, this burner arrangement being in close association with theflue 34 formed by upstanding wall 22, and being used as a simmer burnerin the particular burner device herein disclosed. The main burner isprovided by way of a plurality of burner ports 52 extending throughupstanding wall 26 adjacent the shoulder 36 in communication withchamber30.

With particular reference to the design for the burner head abovedescribed, and with respect to the location of the burner ports 50 and52 relative to one another and the other associated elements of theburner design, it has been found that efiicient operation of the burnersis attained. However, the arrangement is such that it is impossible tocross-light directly from one of the said burners to the other, and theparticular improvement contemplated by the present invention relates tonovel means for efiecting this cross-lighting between the two saidburners.

Such means in the illustrative embodiment of Figures 1 to 4 inclusive isconstituted by an elongated slot 54 formed in the connecting web 42 incommunication with the annular chamber 28 and which may terminate ateach end in enlarged orifices or ports 56 and 58 oppositely disposed toone another, the former being in opposed relation to the open end of theflash tube i8 and the latter of which is disposed in flame ignitingrelation to the burner ports 50. The said cross-lighting means furtherincludes an elongated slot Gil formed in part in the connecting web 42and in part in the upstanding wall 2%, the said slot terminating in thesaid connecting web 42 in flame igniting relation to the orifice 5G, andat its other end in flame igniting relation to one or more of the burnerports 52. In order to facilitate flame propagation or travel along slot68 upwardly to the burner ports 52, it has been found desirable todispose the said slot in wall 26 in inclined relation with respect tothe axis of the burner head and to curve or round the edge 6| at thejunction of the bridging web 52 and wall 26, and tofurther provide asuitable passage or opening for supplying secondary air thereto. Thislatter requirement is fulfilled by the provision of the opening 62defined in part by the said curved or rounded edge I mer burner ports50.

8| and in part by the spacedlugs 84 and 66 provided with the dependingflanges 85 and 81, respectively. These flanges 65 and 51 furtherproflash tube I8 whereit is ignited by pilot light I4 and which likewisecauses the ignition of the gas discharged through the slot 54.v ,T'he

flame then travelsgalong this slot and will ignite the gas beingdischarged through the simofthe same valve, or anothervalve, combustiblegas may be introduced into the chamber 30 of the burner head and isdischarged through the slot 60 .where it is ignited by the flame at slot04 and jet 56. This flame then travels upwardly to the burner ports 52to ignite the gas being discharged therefrom. n

Although cross-lighting has been effected before in burner devices ofthe type herein described, nevertheless such means as have been providedin the past have increased the cost of manufacture and have seriouslyinterfered with manufacturing, procedures, particularly where the burnerheads are of cast construction. According to the present invention, noauxiliary elements or parts need be incorporated in the burner heads toeffect the cross-lighting between the burners, thus greatly simplifyingthe manufacture of these burner heads and the manufacturing processes bywhich the same are made. Embodiedin the simplified construction are the.two slots communicating with the annular gas conducting chambers,andwhich are in flame igniting relation one to the other, as well aswith simmer and main burnerports, whereby cross lighting can beeffected. According to this simplified construction, the simmer and mainburner ports can be located for maximum burner efficiency. I 1

The principles involved in the constructions shown in Figures 1 to 4inclusive may be readily embodied in burner heads of multi-partconstruction, as more particularly exemplified in Figures 5 to 9inclusive, which figures disclose one of a plurality of embodiments inwhich the cross-lighting means of the hereinbefore described embodimentsmay be incorporated. In this embodiment selected to further illustratethe invention, the burner head I2 is constituted by two parts I4 and I6secured together by way of one or more bolts or screws 18 and whichassembled burner head may be incorporatedin a burner device such asdisclosed in Figure '7, comprising a group or battery of burner bases80, each of which is formed with radially spaced gas conducting chambers82 and 84, which may communicate with gas conducting conduits 80 and 88,respectively, leading to a source of combustible gas controlled bysuitable valve mechanism.

As in the previous illustrative embodiments of .the invention, a pilotlight 90, controlled by valved Jet 92, may be provided substantiallycentrally of the group of burners, and which pilot light is inassociation withthe ends of a plueach of the burners of the group andwhich maybe mounted upon gas conductors as by way of the spaced brackets88 and 98.

The part 18 of the burner head is of integral construction and is formedin part by the radially spaced upstanding walls I00 and IIII integrallyconnected by a'bridging or connecting wall or web I02 to form in partanannular auxiliary or simmer burner gas conducting chamber 1 I03therebetween. Said part 18 is further formed with a curved ordish-shaped wall I04-overhanging wall I00 and forming in part a main gasconducting chamber I05. Walls I00 and I04 extend partially around thehead and merge with the radiallylextending end walls I05 and III! of amanifold I08 which provides means for introducing gas into the burnerhead.

.This manifold further includes the radially Upon further operationfrom-' the chamber 82.

spaced walls I08 and, III] forming in partthe manifold chamber I IItherebetween which communi cates with the main g'as conducting chamberI05. This manifold is further provided with spaced openings I I2 and H3separated byway of a wall II4 extending betweenwalls I09 and M0 forreinforcing said manifold, and the said openings providing means for,communicating with the manifold chamber III for introducing gas thereinand to the saidchamber I05 from the chamber 84. The said connecting wallI02 at the manifold I08 is provided with the spaced openings H5 and Illwhereby gas can be introduced into the said auxiliary chamber I03 Aswill be clearly apparent from the drawings, the manifold I08 is of sucha construction as to seat upon the base 80 wherebythe openings H2, H3and H5 and III are in proper communicating. relation with the chambers84 and 82, respectively. The head I2 is secured to said base 80 by meansof bolts or the like registering in openings I23 and I25 formed in earsI21 adjacent the ends of the openings Iii and H2 and I2% and I3I,respectively, formed in base 80.

, H8 is provided adjacent its lower end with an rality of flash tubes84, one being used for 7s enlarged part I22 disposed to abut with wallsI00 and H0, and which enlarged part terminates in a downwardly dependingannular wall I24 disposed to have end abutting relation with the wallIOI, whereby a vertical inner flue I25 is provided which merges with thelower end of an annular inclined surface I28, and which surface isprovided with a plurality of burner ports I30 extending intocommunicating relation with the chamber I03. The opposed wall H8 isprovided with a depending annular flange I32 fitting within the wallsI04 and I09 and adjacent which is an annular ledge or flange I34overhanging the adjacent abutted end of walls I04 and I09, the said wallI I8 being further provided between wall I20 and annular ledge I34 witha plurality of outwardly extending burner ports or jets I38communicating with the main gas conducting chamber I05.

According to the embodiment disclosed, the enlarged part I22 seats witha metal gasket I38 disposed between the same and the adjacent walls I00and H0 for sealing the joint between the two parts I4 and 18 when thescrews or the like 18 are tightened.

Flame propagation may be effected between the lighting of the outerburner.

the pilot light 90 and the simmer burner ports when gas is introducedinto auxiliary chamberv I03 by a slot I40 provided in the walls I00, IOIand I02 which may terminate at one end in orifice or jet I42 in flameigniting relation to the simmer burner orifices I30, and at its otherend in a jet or orifice I44 disposed in opposed relation to the flashtube 94. In order to eflfect a cross-' lighting between the simmerburner and the main burner, part I is further provided with a slot I46formed in the wall I04 and terminating at one end in flame ignitingrelation to the orifice I49 which in turn is in flame igniting relationto the orifice I44, and at its other end in enlarged orifice or jet I48disposed to emit a jet of flame beyond the ledge I34, whereby flame maybe propagated to the main burner ports I36. By disposingthe slot I46 inangularly displaced relation to the slot I40 the flash tube 94 may bebrought into efi'ective operative association with said slot I40 withoutinterfering in any way with In order to effectuate flame propagationbetween orifice I44 and the slot I46 the saidorifice I49 is providedintermediate the same whereby the lighting of the outer burner can beeasily and readily accomplished.

As in the previously described embodiments,

, novel means for cross-lighting between the burners is incorporated inthe multi-part burner construction to provide a simplified design with aminimum of parts which can be readily and easily manufactured at lowcost and without affecting in any way the efllciency of the saidburners.

While I have herein described and upon the drawings shown illustrativeembodiments of the invention, it is to be understood that the inventionis not limited thereto, but may comprehend other constructions,arrangements of parts, details and features without departing from thespirit of the invention.

I claim:

1. In a double burner construction, the combination of a burner memberhaving inner and outer noncommunicating gas chambers, each adapted to beconnected to an independently controlled source of gas supply, saidburner member having a series of inner gas ports in communication withsaid inner gas chamber, and a series of outer gas ports in communicationwith said outer gas chamber, in which said inner and outer series of gasports are disposed so that the flames from one of said series of gasports will not directly ignite the gas emerging from said other seriesof gas ports, a pilot light, and a flash tube extending from a pointadjacent said pilot light to a point adjacent said burner member, aflash tube feeding port spaced from said two series of gas ports andcommunicating with one of said gas chambers and disposed to projectgasinto the adjacent end of said flash tube, gas outlet means in saidburner member communicating with said inner gas chamber and constitutinga flame propagating means for igniting said inner series of gas portsfrom said flash tube feeding port, and gas outlet means in said burnermember communicating with said outer'gas chamber and constituting aflame propagating means for igniting said outer series of gas ports fromsaid flash tube feeding port.

2. The construction defined in claim 1 further characterized in that theflash tube feeding port is disposed in communication with the inner gaschamber.

3. The construction defined in claim 1 further characterized in that thegas outlet means communicating with said outer gas chamber is disposedto propagate a flame along a path which is at an angle to the verticalwhereby the respective portions of said propagated flame have freeaccess to secondary air of combustion.

4. The construction defined in claim 1 further characterized in that thegas outlet means communicating with said outer gas chamber is a slotformed in the wall of said chamber.

5. The construction defined in claim 1 further characterized in that thegasoutlet means communicating with said outer gas chamber is adiagonally disposed slot formed in the wall of said gas chamber.

PHILIP S. HARPER.

